CVE-2026-56315

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-06-23. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Elevated
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1.1%CVSS: 9.8Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

picklescan before 1.0.4 fails to block at least seven Python standard library modules (including uuid, _osx_support, _aix_support, _pyrepl.pager, and imaplib) exposing eight functions that provide direct arbitrary command execution. Attackers can craft malicious pickle files importing these unblocked modules to achieve remote code execution while bypassing picklescan's safety validation entirely.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
75
EG Risk 75/100

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation40% × 40%
Automatability100% × 15%
EPSS PROB
1.1%
EPSS %ILE
65th
KEV
Not listed

Published

June 23, 2026

Last Modified

June 23, 2026

Advisory Details (2)

Auto-updated Oct 4, 2026
🔬 Proof of concept available. Patch available. Sources: github.
githubMentions a patch (unverified)🟡 PoC Available

Multiple stdlib modules with direct RCE not in blocklist · Advisory · mmaitre314/picklescan · GitHub

https://github.com/mmaitre314/picklescan/security/advisories/GHSA-g38g-8gr9-h9xp
generic

picklescan - Remote Code Execution via Unblocked Standard Library Modules | Advisories | VulnCheck

https://www.vulncheck.com/advisories/picklescan-remote-code-execution-via-unblocked-standard-library-modules

Vendor Advisories for CVE-2026-56315(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFix by version rangeDependents
picklescan0.0.1 ... 1.0.3 (39 versions)
  • every version up to 1.0.4: fixed in 1.0.4
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 8× in last 7d / 33× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 449 total refreshes for this CVE.

  1. 2026-10-10 20:00 UTCEPSS rescore
  2. 2026-10-09 20:07 UTCEPSS rescore
  3. 2026-10-08 17:13 UTCEPSS rescore
  4. 2026-10-08 04:24 UTCOSV refresh
  5. 2026-10-07 23:48 UTCEPSS rescore
  6. 2026-10-06 15:18 UTCEPSS rescore
  7. 2026-10-05 17:43 UTCEPSS rescore
  8. 2026-10-04 23:22 UTCEPSS rescore
  9. 2026-10-03 14:26 UTCEPSS rescore
  10. 2026-10-02 17:56 UTCEPSS rescore
  11. 2026-10-01 19:50 UTCEPSS rescore
  12. 2026-09-30 15:03 UTCEPSS rescore
  13. 2026-09-29 15:22 UTCEPSS rescore
  14. 2026-09-28 13:51 UTCEPSS rescore
  15. 2026-09-27 13:48 UTCEPSS rescore
  16. 2026-09-26 15:59 UTCEPSS rescore
  17. 2026-09-24 14:04 UTCEPSS rescore
  18. 2026-09-23 17:54 UTCEPSS rescore
  19. 2026-09-20 20:16 UTCEPSS rescore
  20. 2026-09-18 19:28 UTCEPSS rescore
  21. 2026-09-18 10:29 UTCEG score recompute
  22. 2026-09-18 10:29 UTCGHSA enrichment
  23. 2026-09-17 19:31 UTCEPSS rescore
  24. 2026-09-16 14:08 UTCEPSS rescore
  25. 2026-09-16 05:15 UTCEPSS rescore
Show 75 more
  1. 2026-09-15 03:11 UTCEPSS rescore
  2. 2026-09-14 05:58 UTCGHSA enrichment
  3. 2026-09-14 02:06 UTCEG score recompute
  4. 2026-09-14 02:06 UTCGHSA enrichment
  5. 2026-09-13 16:47 UTCEPSS rescore
  6. 2026-09-13 12:26 UTCEG score recompute
  7. 2026-09-13 12:26 UTCGHSA enrichment
  8. 2026-09-11 14:53 UTCEPSS rescore
  9. 2026-09-10 09:35 UTCEPSS rescore
  10. 2026-09-08 22:01 UTCEPSS rescore
  11. 2026-09-07 16:01 UTCEPSS rescore
  12. 2026-09-06 13:47 UTCEPSS rescore
  13. 2026-09-04 05:07 UTCEPSS rescore
  14. 2026-09-02 14:12 UTCEPSS rescore
  15. 2026-09-01 13:54 UTCEPSS rescore
  16. 2026-09-01 04:40 UTCEPSS rescore
  17. 2026-08-31 00:18 UTCGHSA enrichment
  18. 2026-08-30 20:27 UTCEG score recompute
  19. 2026-08-30 20:27 UTCGHSA enrichment
  20. 2026-08-30 19:17 UTCEPSS rescore
  21. 2026-08-30 01:22 UTCEPSS rescore
  22. 2026-08-28 21:41 UTCEPSS rescore
  23. 2026-08-27 14:25 UTCEPSS rescore
  24. 2026-08-26 14:46 UTCEPSS rescore
  25. 2026-08-25 13:49 UTCEPSS rescore
  26. 2026-08-25 05:59 UTCGHSA enrichment
  27. 2026-08-25 02:04 UTCGHSA enrichment
  28. 2026-08-24 22:12 UTCEG score recompute
  29. 2026-08-24 22:12 UTCGHSA enrichment
  30. 2026-08-24 13:55 UTCEG score recompute
  31. 2026-08-24 13:55 UTCGHSA enrichment
  32. 2026-08-24 04:58 UTCGHSA enrichment
  33. 2026-08-23 23:18 UTCGHSA enrichment
  34. 2026-08-23 19:27 UTCGHSA enrichment
  35. 2026-08-23 15:36 UTCGHSA enrichment
  36. 2026-08-23 11:45 UTCGHSA enrichment
  37. 2026-08-23 07:53 UTCGHSA enrichment
  38. 2026-08-23 02:41 UTCEG score recompute
  39. 2026-08-23 02:41 UTCGHSA enrichment
  40. 2026-08-23 00:19 UTCEPSS rescore
  41. 2026-08-22 22:45 UTCGHSA enrichment
  42. 2026-08-22 14:00 UTCGHSA enrichment
  43. 2026-08-22 01:18 UTCEG score recompute
  44. 2026-08-22 01:18 UTCGHSA enrichment
  45. 2026-08-21 23:49 UTCEPSS rescore
  46. 2026-08-21 21:27 UTCGHSA enrichment
  47. 2026-08-21 17:34 UTCGHSA enrichment
  48. 2026-08-21 13:16 UTCGHSA enrichment
  49. 2026-08-21 09:24 UTCGHSA enrichment
  50. 2026-08-21 05:23 UTCGHSA enrichment
  51. 2026-08-20 23:59 UTCEG score recompute
  52. 2026-08-20 23:59 UTCGHSA enrichment
  53. 2026-08-20 22:55 UTCEPSS rescore
  54. 2026-08-20 20:06 UTCGHSA enrichment
  55. 2026-08-20 16:14 UTCGHSA enrichment
  56. 2026-08-20 11:40 UTCGHSA enrichment
  57. 2026-08-20 07:47 UTCEG score recompute
  58. 2026-08-20 07:47 UTCGHSA enrichment
  59. 2026-08-19 17:04 UTCEPSS rescore
  60. 2026-08-19 12:43 UTCGHSA enrichment
  61. 2026-08-19 08:42 UTCGHSA enrichment
  62. 2026-08-19 04:50 UTCEG score recompute
  63. 2026-08-19 04:50 UTCGHSA enrichment
  64. 2026-08-18 13:48 UTCEPSS rescore
  65. 2026-08-17 15:41 UTCEG score recompute
  66. 2026-08-17 15:41 UTCGHSA enrichment
  67. 2026-08-17 13:47 UTCEPSS rescore
  68. 2026-08-17 11:49 UTCGHSA enrichment
  69. 2026-08-17 07:49 UTCGHSA enrichment
  70. 2026-08-17 03:55 UTCGHSA enrichment
  71. 2026-08-17 00:04 UTCGHSA enrichment
  72. 2026-08-16 20:13 UTCGHSA enrichment
  73. 2026-08-16 16:06 UTCEG score recompute
  74. 2026-08-16 16:06 UTCGHSA enrichment
  75. 2026-08-16 14:56 UTCEPSS rescore

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-56315?
CVE-2026-56315 is a critical vulnerability published on June 23, 2026. picklescan before 1.0.4 fails to block at least seven Python standard library modules (including uuid, osxsupport, aixsupport, _pyrepl.pager, and imaplib) exposing eight functions that provide direct arbitrary command execution. Attackers can craft malicious pickle files importing these unblocked…
When was CVE-2026-56315 disclosed?
CVE-2026-56315 was first published on June 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-56315 actively exploited?
CVE-2026-56315 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.1% probability of exploitation in the next 30 days (65th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-56315?
CVE-2026-56315 has a CVSS base score of 9.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-56315?
A fix for CVE-2026-56315 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-56315 are linked in the Vendor Advisories panel on this page.

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